#!/usr/bin/env python
# -*- coding:utf-8 -*-
from flask import abort, jsonify
from flask import current_app
from flask import g
from flask import request
from flask.templating import render_template

from info import db
from info.models import News, Comment, CommentLike, User
from info.modules.news import news_blu
from info.response_code import RET
from info.utils.common import user_login_data


@news_blu.route("/<int:news_id>")
@user_login_data
def news_detail(news_id):
    # 取到用户id

    user = g.user

    # 右侧的新闻排行的逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(6)
    except Exception as e:
        current_app.logger.error(e)

    # 定义一个空的字典列表，里面装的就是字典
    news_dict_li = []
    # 遍历对象列表，将对象的字典添加到字典列表中
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    # 查询新闻数据
    news = None

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        # 报404错误，404错误统一显示页面后续再处理
        abort(404)

    # 更新新闻的点击次数
    news.clicks += 1

    # 是否收藏按钮的显示
    is_collected = False

    if user and (news in user.collection_news):
        is_collected = True

    # 去查询评论数据
    comments = []
    try:
        comments = Comment.query.filter(Comment.news_id == news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)

    comment_like_ids = []
    if g.user:
        try:
            # 需求：查询当前用户在当前新闻里面都点赞了哪些评论
            # 1. 查询出当前新闻的所有评论 ([COMMENT]) 取到所有的评论id  [1, 2, 3, 4, 5]
            comment_ids = [comment.id for comment in comments]
            # 2. 再查询当前评论中哪些评论被当前用户所点赞 （[CommentLike]）查询comment_id 在第1步的评论id列表内的所有数据 & CommentList.user_id = g.user.id
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),
                                                     CommentLike.user_id == g.user.id).all()
            # 3. 取到所有被点赞的评论id 第2步查询出来是一个 [CommentLike] --> [3, 5]
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]  # [3, 5]
        except Exception as e:
            current_app.logger.error(e)

    comment_dict_li = []
    for comment in comments:
        comment_dict = comment.to_dict()
        # 代表没有点赞
        comment_dict["is_like"] = False
        # 判断当前遍历到的评论是否被当前登录用户所点赞
        if comment.id in comment_like_ids:
            comment_dict["is_like"] = True
        comment_dict_li.append(comment_dict)

    # 返回当前新闻的作者相关信息(关注与取消关注)
    is_followed = False
    if user and news.user:
        if news.user in user.followed:
            is_followed = True

    data = {
        "user": user.to_dict() if user else None,
        "news_dict_li": news_dict_li,
        "news": news.to_dict(),
        "is_collected": is_collected,
        "comments": comment_dict_li,
        "is_followed": is_followed

    }
    return render_template("news/detail.html", data=data)


@news_blu.route("/news_collect", methods=["POST"])
@user_login_data
def news_collect():
    user = g.user

    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登陆")

    req = request.json
    news_id = req.get("news_id", "")
    action = req.get("action", "")

    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ["collect", "cancel_collect"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        news_id = int(news_id)

    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 查询新闻是否存在
    try:
        news = News.query.get(news_id)

    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据库查询出错")

    if not news:
        return jsonify(errno=RET.DATAERR, errmsg="查询不到相应数据")

    # 收藏
    if action == "collect":
        if news not in user.collection_news:
            user.collection_news.append(news)
    else:
        # 取消收藏
        if news in user.collection_news:
            user.collection_news.remove(news)

    return jsonify(errno=RET.OK, errmsg="收藏成功")


@news_blu.route('/news_comment', methods=["POST"])
@user_login_data
def comment_news():
    """
    评论新闻或者回复某条新闻下指定的评论
    :return:
    """

    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    # 1. 取到请求参数
    news_id = request.json.get("news_id")
    comment_content = request.json.get("comment")
    parent_id = request.json.get("parent_id")

    # 2. 判断参数
    if not all([news_id, comment_content]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        news_id = int(news_id)
        if parent_id:
            parent_id = int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 查询新闻，并判断新闻是否存在
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    # 3. 初始化一个评论模型，并且赋值
    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_content
    if parent_id:
        comment.parent_id = parent_id

    # 添加到数据库
    # 为什么要自己去commit()?，因为在return的时候需要用到 comment 的 id
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    return jsonify(errno=RET.OK, errmsg="OK", data=comment.to_dict())


@news_blu.route("/comment_like", methods=["POST"])
@user_login_data
def comment_like():
    user = g.user
    if not user:
        return jsonify(errno=RET.SERVERERR, errmsg="用户未登陆")

    resp = request.json
    news_id = resp.get("news_id")
    comment_id = resp.get("comment_id")
    action = resp.get("action")

    if not all([news_id, comment_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数不全")
    if action not in ["add", "remove"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 查询新闻，并判断新闻是否存在
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    # 查询新闻，并判断新闻是否存在
    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not comment:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    if action == "add":
        comment_like = CommentLike.query.filter(CommentLike.comment_id == comment_id,
                                                CommentLike.user_id == user.id).first()
        if not comment_like:
            comm_like = CommentLike()
            comm_like.comment_id = comment_id
            comm_like.user_id = user.id

            try:
                db.session.add(comm_like)
                db.session.commit()
            except Exception as e:
                current_app.logger.error(e)
                db.session.rollback()

            comment.like_count += 1

    else:
        comment_like = CommentLike.query.filter(CommentLike.comment_id == comment_id,
                                                CommentLike.user_id == user.id).first()
        if comment_like:

            try:
                db.session.delete(comment_like)
                db.session.commit()
            except Exception as e:
                current_app.logger.error(e)
                db.session.rollback()

            comment.like_count -= 1

    return jsonify(errno=RET.OK, errmsg="执行成功")


@news_blu.route('/followed_user', methods=["POST"])
@user_login_data
def followed_user():
    """关注/取消关注用户"""
    if not g.user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    user_id = request.json.get("user_id")
    action = request.json.get("action")

    if not all([user_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ("follow", "unfollow"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 查询到关注的用户信息
    try:
        target_user = User.query.get(user_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据库失败")

    if not target_user:
        return jsonify(errno=RET.NODATA, errmsg="未查询到用户数据")

    # # 根据不同操作做不同逻辑
    # if action == "follow":
    #     if target_user.followers.filter(User.id == g.user.id).count() > 0:
    #         return jsonify(errno=RET.DATAEXIST, errmsg="当前已关注")
    #     target_user.followers.append(g.user)
    # else:
    #     if target_user.followers.filter(User.id == g.user.id).count() > 0:
    #         target_user.followers.remove(g.user)
    user = g.user

    if action == "follow":
        if target_user not in user.followed:
            user.followed.append(target_user)

        else:
            return jsonify(errno=RET.DATAEXIST, errmsg="已关注过该用户")
    else:
        if target_user in user.followed:
            user.followed.remove(target_user)
        else:
            return jsonify(errno=RET.DATAEXIST, errmsg="该用户未被关注")

    # 保存到数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据保存错误")

    return jsonify(errno=RET.OK, errmsg="操作成功")
